The most reasonably priced component used on the Sfs 2011 Eu (streetfighter S) 9151-2901c 021a Front Forks is the Screw Tceif M8x30.
The 021a Front Forks is made up of components including this Fork Leg Assy, Left which is the most expensive.
On this parts fiche the Screw Tceif M8x30 is the most specified component.